Base ring for furnace casings



Sept. 15, 1925.

J. VRBA .BASE RING FOR FURNACE CASINGS Filed Nov. 24 1924 frlz/ezzzor Patented Sept. 15, 1925.

- JAMES mum, ormmsnamrown, IOWA; ASSIGNOR "r EENNOX FURNACE COMPANY,

or mnsnarnrowng IOWA.

QBASE:RING1FOR FURNACE GASIN'GS.

7T0 all whom dame concern! of the:United States, and a' resident of ,Marsha'lltown, ,in the .county of Marshall 6 and State: of Iowa, liave invented a certame new and useful Base Ring for Furnace Oasings,"of which the following is aspecification.

In theconstruction of modern furnaces 0 there.-:is.,-usually provided. a combustion chamber and a furnace casing surrounding it. and spaced 3. considerablev distance from it, and there is alsousually provided a base ring for ithefurnace casing ordinarily made 0f. angle-bar. .metal,' to. which the furnace casing is secured. fThe'se-sbase rings of angle .bar material areusuall formed into a sub stantially.completecirc eand transported to the point whereathe. furnace is to be in- 0 stalled. vThey are quite bulky ;in.size and in handling and. transportation they: are frequently distorted from their original shape,

* and it is a-matter of considerable difliculty when installing a furnace rtolhave thesebase rings lay flatnponthe surface upon which the furnace islrbeing installed.

The objects of my invention arevto provide. a base ringofrthis character of simple, ,du-.

rable .andinexpensive construct-ion, made/in a numberofcast metal sections, interchangeable v witheach other, and ofa relatively short length -.so. they may be easily transported and handled, and also so arranged tthatw-hen. fitted togetherithey will interlock with each other only when extended in a substantially complete circle, and :which. will lie substantially flat .upon the surface on which the furnace is being installed.

.My invention consists infthe construction,

arrangement and combination of the various parts of my. device, whereby the, ob ects contemplated are attained,. as hereinafter more fully set forth, pointedjout in my claims and. illustrated in j the accompanying "drawings, in which:

Figure 1 shows a perspectlve view of a portion of a furnace having my improved base ring applied thereto and a portion of the furnace casing connected to the base ring.

Figure 2 shows a top or plan view of two adjacent portions of my improved base ring members bolted together.

' is formed with r K Figure 3. shows asideelevation of same. Be it knownl'that 1, JAMES VRBA, a citizen p with the sections slightly spaced apart.

Figure 4shows a view similar to "Figure 2 posite. end and 7 Figure 8 shows a vertical plan view of two adjacent basering sections bolted together.

:Referring tothe accompanying drawings I have used the reference numeral 10 to. indicate that portion of a-furnace'shown and 11 the furnace casing. 'The furnace front which projects forwardly from the furnace combustion chamber is in dicated, generally by the numeral 12.

' My improved base ring as preferably constru'cted is madein' five sections, all exactly :alike, and so designed that they may be cast bytan ordinary casting process. Each section comprisesa flat base'18 and an upright rib. 14. At one end there is an .inwar'dlyextendedbolt receiving lug-15 having an opening 16 therein for a bolt. In the rib 14 adjacent tothe lug 15 there is formed a bolt opening 17. The surface adjacent to this belt opening 17 on both sides of the rib 14 is depressed at 18 as shown in Figure 3. Formed on the under surface of the same "end is a segmentahdepression 19, shown in Figure 7, and the lower portion of theflange 14 pro ects over this depression 19 to form clined at '21 as shown in Figure 7. c

" The opposite end of the base ring member an inwardly extended rounded lug 22 having bolt openings 23, and

"this lug stands spaced above the bottom" of the base 13, as shown in Figure 6. At the intersection of "the lug 22 and the bottom of the base 13 there is a beveled or inclined shoulder 24, and the end of the based?) projects beyond the upright flange 14 at 25 In practical use, and when connecting two of the adjacent members together, they are placed in position resting upon the surface on which the furnace is being erected. Then they are moved toward each other until the shoulder 20 on one end engages and overlaps the extending base member 25 on the other member. When this is done, the two bolt receiving lugs 15 and 22 will stand in overlapping positions ready to receive a bolt 26. Furthermore, when in this position the beveled shoulders 21 and 25 will engage, and a portion of the lug 15 will engage the beveled shoulder 24. hen these parts are thus placed together the two base ring sections are then positioned and held against movement in every direction relative to each other, except straight apart, and they are held against such movement by the bolt. When the bolts are inserted as described, then all movement of everyv kind of these two parts relative to each other is prevented, and the bolts cannot be inserted until the parts are so alined as to form with each other a segment of a true circle. The two base ring members that are adjacent to the furnace front 12 may be permanently secured to the furnace front by bolts or rivets through the openings 17, and desired the furnace casing may be secured to the base ring by bolts or rivets through the opening 17.

By having the depressions 18 surround the bolt holes 17, it is obvious that when bolts are inserted through the relatively soft sheet metal furnace casing, and the nuts thereon tightened, portions of the furnace casing will be forced into these depressions, thus aiding materially in holding the furnace casing firmly in position by the bolts, and also aiding in preventing the furnace casing from becoming torn or distorted by strains applied thereto, such as would be done but for the portions of the furnace casing drawn into said depressions.

Attention is directed to the fact that these furnace sections are all interchangeable, and in the event any one should become broken or defective, it would only be necessary to provide a new section, which can be very readily, quickly and easily placed in position.

The advantages of my improved sectional base ring for shipping and transportation are obvious, because the sections are of short length, and being of cast metal are not likely to be bent or distorted, such as is the case with a complete circle base ring made of angle bar. Furthermore, after the installation is complete, the furnace casing forms a relatively true circle, and the furnace casing stands properly spaced apart from the combustion chamber throughout its entire surface. t ,1];

I claim as my invention:

1. A base ring for furnace casings, formed of a series of cast metal sections, each section having at each end an inwardly projected bolt receiving lug, one in a plane above the other, and each end also having coacting lugs designed to interlock with each other to prevent up and down and lateral movement of the sections relative to each other.

2. A base ring for furnace casings, comprising a number of independent cast metal sections, each section comprising a base portion and an upright casing engaging flange, and each section also having at each end inwardly projected bolt receiving lugs, one arranged in a plane above the other, and each section also having at each end coacting projections and depressions so arranged that when two ends are fitted together, said projections and depressions and lugs will hold them in true alinement with each other and against either up and down or lateral movement, and whereby the sections are made interchangeable.

3. An improved base ring for furnace casings, comprising in combination a series of cast metal sections, each section comprising a base and an upright casing engaging flange, one end of each section being formed with an inwardly extended bolt receiving lug with its under surface flush with the bottom of the base, said end being also formed with a recess on its under surface below the casing engaging flange, and also with a beveled outwardly extended end on the base portion, the other end being formed with an inwardly extended bolt receiving lug in a plane higher than that of the first mentioned bolt receiving lug, and also with a beveled portion at the end of the base adjacent to said bolt receiving lug, the base portion being extended beyond the upright casing receiving flange, and said base portion being provided at its end with a beveled portion extended substantially straight outwardly, arranged and combined in substantially the manner set forth and for the purposes stated.

4; An improved base ring for furnace casings, comprising a series of cast segmental sections shaped at their ends to interlock with each other, and each provided with a base and an upwardly extended flange, there being at each end of the flange a bolt opening and a depression surrounding the bolt opening, for the purposes stated.

Des Moines, Iowa, November 6, 1924.

JAMES VRBA. 

